Effects of molecular configuration of a chiral trimeric phenylene vinylene on its liquid crystalline properties  

作　　者：Ping Yu Zhen-Lin Zhang Lei Wang Chun-Luan Liu Shi-Min Liu Hai-Quan Zhang 

机构地区：[1]State Key Laboratory of Metastable Materials Science and Technology,Yanshan University

出　　处：《Chinese Chemical Letters》2013年第5期397-400,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51173155);the Hebei Province Science Foundation of China(No.E2010001182)

摘　　要：Based on an analysis of the 1H NMR,FT-IR,UV-vis spectra,a chiral trimeric phenylene vinylene derivative（ChTPV） synthesized by a Wittig reaction was determined to have a trans-cis configuration, and it could be isomerized to the trans-trans isomer when treated with iodine.The melting point of ChTPV with a trans-trans configuration increased by 162.1℃compared to the trans-cis isomer,and the ChTPV with trans-trans configuration exhibited the typical liquid-crystalline texture of the smectic A in the heating process.The results indicated that the molecular configuration can influence the formation of the liquid crystalline phase of ChTPV.Based on an analysis of the 1H NMR,FT-IR,UV-vis spectra,a chiral trimeric phenylene vinylene derivative（ChTPV） synthesized by a Wittig reaction was determined to have a trans-cis configuration, and it could be isomerized to the trans-trans isomer when treated with iodine.The melting point of ChTPV with a trans-trans configuration increased by 162.1℃compared to the trans-cis isomer,and the ChTPV with trans-trans configuration exhibited the typical liquid-crystalline texture of the smectic A in the heating process.The results indicated that the molecular configuration can influence the formation of the liquid crystalline phase of ChTPV.

关 键 词：Oligomer phenylene vinylene CONFIGURATION Liquid crystalline 

分 类 号：O631.3[理学—高分子化学]